Abstract:
An analytical cell assembly comprising a base with a radiation source mounted on one end, an enclosure on the other end, and a cell proper, with cell heating means, within the enclosure. The enclosure and cell have cooperative fluid flow connections whereby the cell is modular and may be simply lifted out of the enclosure. The enclosure also includes a collimating lens assembly interposed between the cell within the enclosure and the source outside the enclosure on the base. The entire assemblage of source, enclosure and cell can be moved as a unit, making it modular, or just the cell can be moved as a module leaving the enclosure and the source in place in an instrument using the invention cell assembly.
Abstract:
A modular system for performing optical spectroscopy measurements comprising enclosed modules with ports through which optical beams may pass into and out of the modules. The modules may be joined together with the ports aligned and are interchangeable in the sense that the focal point of the optical beam directed out of any output port has the same location relative to the output port.
Abstract:
A method and apparatus for measuring light reflectance, absorption and/or transmission having a plurality of light emitting diodes (LEDs) arranged to direct light emissions toward a test piece, with the various diodes being selected to emit light of different wavelengths and at least one light-responsive sensor disposed to receive light reflected and/or transmitted by the test piece and originating with each of the light-emitting diodes. Electrical drive circuit means are provided for alternately or sequentially energizing the plurality of LEDs of different wavelengths, such that the reflected or transmitted light received by the sensor is a function of the various wavelengths of the respective LEDs. In one embodiment, the sensor is operative to generate an output signal indicative of the characteristics of the test piece as a function of the different wavelengths of the LEDs which signal is processed to provide a display of the ''''differential'''' light reflectance, transmission and/or absorption characteristics of the workpiece and the wavelengths of the LEDs. In another embodiment, a plurality of LEDs each having a different frequency is operative to generate a range of signals which provide a measurement of reflectance, transmission and/or absorption as a function of the wavelengths of the various LEDs employed. The plurality of LED sources and the sensor may be mounted within a self-contained module which may be detachably connected to an instrument housing containing the drive and output circuitry and display means, such that a number of different source modules may be provided each having LEDs of unique wavelength with the various modules being interchangeable to permit a wide variety of measurement frequencies.
Abstract:
A modular testing device includes a base unit and an expansion unit that communicates with the base unit. The expansion unit includes a housing, a receptacle in which a sample holder containing a biological sample and reagent mixture can be placed, and an optical assembly positioned in the housing. The optical assembly is configured to amplify and detect a signal from the biological sample and reagent mixture. Data that is collected in the optical assembly is communicated to the base unit.
Abstract:
Die Erfindung stellt eine Messvorrichtung bereit zum Analysieren einer lumineszierenden Probe und insbesondere Messen der Konzentration wenigstens eines Analyts in einer lumineszierenden Probe, aufweisend: ein Gehäuse mit einem Probenaufnahmeraum zum Aufnehmen eines Probenbehälters; einen Probenbehälter zum Aufnehmen der lumineszierenden Probe; eine Strahlungsempfängereinrichtung zum Empfangen von der lumineszierenden Probe abgegebenen Strahlung, und eine Auswerteeinrichtung zum Auswerten der von der Strahlungsempfängereinrichtung empfangenen Strahlung der lumineszierenden Probe. Außerdem stellt die Erfindung eine Messvorrichtung bereit, aufweisend ein Basisteil und einen an dem Basisteil austauschbar angeordneten Messkopf, wobei der Messkopf zum Analysieren einer lumineszierenden Probe oder als Spektrometer-Messkopf ausgebildet ist.
Abstract:
An efficient absorption spectroscopy system is provided. The spectroscopy system may be configured to measure solid, liquid or gaseous samples. Vacuum ultra-violet wavelengths may be utilized. Some of the disclosed techniques can be used for detecting the presence of trace concentrations of gaseous species. A preferable gas flow cell is disclosed. Some of the disclosed techniques may be used with a gas chromatography system so as to detect and identify species eluted from the column. Some of the disclosed techniques may be used in conjunction with an electrospray interface and a liquid chromatography system so as to detect and identify gas phase ions of macromolecules produced from solution. Some of the disclosed techniques may be used to characterize chemical reactions. Some of the disclosed techniques may be used in conjunction with an ultra short-path length sample cell to measure liquids.
Abstract:
The invention relates to means for the examination of a sample, wherein a first input light beam (L1) is totally internally reflected at a detection surface of a sample chamber (111), while a second input light beam (L1') is transmitted through the sample chamber (111). The resulting first and second output light beams (L2, L2') are detected and can be evaluated with respect to frustrated total internal reflection and optical absorbance, respectively. Preferably, both output light beams (L2, L2') are detected by a single image sensor (155).
Abstract:
The present invention relates to an imaging device comprising: an illumination module (1) comprising means for emitting at least one excitation beam; a scanning/injection module (2) comprising an image waveguide (3), the two ends of which, the proximal end (3a) and the distal end (3b) respectively, are connected via a plurality of optical fibres, and scanning/injection means (6) designed to inject the at least one excitation beam in turn into a fibre of the image waveguide (3) and then into the proximal side (3a) of said waveguide and a detection module (4) comprising means for detecting a light flux (14) collected at the distal end (3b) of the waveguide. At least either the illumination module (1) or the detection module (4) is optically conjugate with the scanning/injection module (2) via a conjugating optical fibre (5, 7). The use of conjugating fibres (5, 7) enables the maintenance, repair and updating of the device to be improved. It also enables modal filtering of the excitation beam to be carried out and ensures that the device is confocal.
Abstract:
Ce module de contrôle (18) comprend des moyens de contrôle (48) de l'article, des moyens de réglage d'au moins un paramètre des moyens de contrôle (48) de l'article et des moyens d'entraînement (60) de l'article vers les moyens de contrôle (48). Plus particulièrement, il est mobile et comprend des moyens de liaison libérables (88) avec un bâti fixe (16). De préférence, les moyens d'entraînement (60) comprennent un carrousel (62) comprenant au moins une alvéole (64) de logement de l'article. L'article est par exemple une bouteille en verre.
Abstract:
A multichannel fluorosensor includes an optical module and an electronic module combined in a watertight housing with an underwater connector. The fluorosensor has an integral calibrator for periodical sensitivity validation of the fluorosensor. The optical module has one or several excitation channels and one or several emission channels that use a mutual focusing system. To increase efficiency, the excitation and emission channels each have a micro-collimator made with one or more ball lenses. Each excitation channel has a light emitting diode and an optical filter. Each emission channel has a photodiode with a preamplifier and an optical filter. The electronic module connects directly to the optical module and includes a lock-in amplifier, a power supply and a controller with an A/D converter and a connector. The calibrator provides a response proportional to the excitation intensity, and matches with spectral parameter of fluorescence for the analyzed fluorescent substance.